Correct Option: C. anther to the stigma of same plant Explanation of the Correct Answer: Self-pollination is a process in flowering plants where pollen grains from the anther (the male part of the flower) are transferred to the stigma (the female part of the flower) of the same plant. This means that the plant can fertilize its own ovules without needing pollen from another plant.

1. Understanding Plant Anatomy:
2. Anther: This is the part of the stamen (the male reproductive organ) that produces pollen grains.
3. Stigma: This is the part of the pistil (the female reproductive organ) that receives pollen.
4. Process of Self-Pollination:
5. In self-pollination, the pollen grains produced by the anther fall directly onto the stigma of the same flower or another flower on the same plant. This can occur in various ways, such as through gravity, wind, or the movement of pollinators.
6. Advantages of Self-Pollination:
7. It ensures that a plant can reproduce even in the absence of pollinators or other plants of the same species.
8. It can lead to the preservation of successful genetic traits since the genetic material comes from the same plant.

Why the Other Options are Incorrect:

• Option A: stigma to the anther of another plant:
• This describes cross-pollination, where pollen is transferred from the stigma of one plant to the anther of another plant. This is not self-pollination, as it involves two different plants.
• Option B: stigma to the anther of same plant:
• This option also describes a process that is not self-pollination. It suggests that pollen is moving from the stigma back to the anther, which is not how pollination works. Pollination involves the transfer of pollen from the anther to the stigma, not the other way around.
• Option D: anther to the stigma of another plant:
• Similar to Option A, this describes cross-pollination. Here, pollen is transferred from the anther of one plant to the stigma of a different plant, which again does not fit the definition of self-pollination.

Summary of Key Points:

• Self-pollination occurs when pollen from the anther of a flower fertilizes the stigma of the same flower or another flower on the same plant.
• It allows for reproduction without the need for external pollen sources.
• Cross-pollination involves pollen transfer between different plants, which is not self-pollination.
• Understanding plant reproductive structures is crucial for distinguishing between self-pollination and cross-pollination.

Revision Summary:

• Self-pollination: pollen from the same plant's anther to its stigma.
• Cross-pollination: involves different plants.
• Key structures: anther (produces pollen) and stigma (receives pollen).
• Self-pollination ensures reproduction even without external pollinators.